Loose-leaf binder.



E. H. ELDER. LOOSE LEAF BINDER. APPLICATION FILED JUNBzv, 191s.

Patented Jan, 27, 1914.

UMBM PLANOGRAPH cD..wASN|NuToN. u. c.

TOWNE, AND F. IV. WILSON, OF HOLYOKE, MASSACHUSETTS.

LOOSE-LEAF BINDER.

Specification of Letters Patent.

Application led .Tune 27, 1913.

Patented Jail. 27, 1914. Serial No. 776,120.

To (6U who/1L it may concern Be it known that I, Eowano Hanni' ELDER, a citizen of the United States, residing at Chicopee Falls, Hampden county, State of I Massachusetts, have invented certain new and useful Improvements in Loose-Leaf Binders; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to 'certain new and useful improvements in loose-leaf binders and the object thereof is to provide improved means for guiding the side clamping' members, which means strengthens and reinforces the back and also provides guides that are of maximum etliciency.

Further the invention aims to provide guiding means which are formed or constructed so as to prevent the ingress of foreign matter into the back, thus presenting a dust proof binder.

In the drawings: Figure 1 is a horizontal section taken through the rear part of a device constructed in accordance with the present invention; Fig. 2 is a section taken on the line 2 2 of Fig. 1; Fig. 3 is a section taken on the line 3 3 of Fig. 1; Fig. 4 is an end view of the metal back; Fig. 5 is a perspective view in fragment of one end of one of the side clamping members; Fig. 6 is a plan view, in fragment of one of the leaves commonly used with lo0se-leaf binders; and Fig. 7 is a view similar to Fig. 5 of a modified form of side clamping member.

The .metal back plate l, has right angular ends which latter are provided with guideways 3 that are formed by striking out the metal of the ends 2 from the inner faces of the ends, whereby the struck-out portions provide exterior strengthening and reinforcing ribs and interior guideways, as depicted. in Figs. 3 and 4.

The side clamping members are of L` shape havingbase portions 4 and right angular sides 5, the latter having ends 6 which are bent inwardly to extend at right angles to the sides and are provided with feetI 7 that are bent inwardly at right angles to the ends and are engaged with the inner faces of the bases 4 to which latter they are welded. As shown in Fig. 7 the feet may be omitted and the inner edges 8 of the ends G may be directly welded, or otherwise secured to the bases 4, or the feet. T may be perfectly free and not be welded to the bases 4.

The ends G, obviously, by reason of their securement to the bases 4, strengthen and reinforce the side clamping members, and present a strong and rigid structure. As depicted in Figs. 5 and 7, the ends of the bases 4 project beyond the outer faces of the ends 6 to provide tongues 9, which are received in the guideways 3.

The back l, is provided with ears l0 that receive an operating rod ll, the latter having right and left hand threads carrying nuts 12 to each of which nuts a pair of toggle levers 13 is pivoted, the opposite ends of the levers 13 being pivoted to the side clamping plates. The clamping plates have telescopic tubes and rods 14 and l5 respectively as is common in thc art, the tubes and rods being received in the key-hole shaped slots K of the leaves L. One of the ends 2 of the back 1 has an aperture 16 to admit a key (not shown) whereby the key may operate the rod 11.

From the above it will be evident that slots or other guides which weaken the structure are eliminated; in fact, as is apparent, the struck-out guide strengthens and reinforces the structure` and in addition the ends of the clamping members by direct contact with the bases of the latter strengthen and,

brace said members. Since the extension tongues 9 are mere continuations of the bases of the clamping members. it will bc seen that same are strong and effective, and since no bending' of the metal is necessitated to form said tongues, the latter are possessed of maximum strength. Since the hole 16 for the key is the only means of ingress of dust into the back, the device is practically dust proof.

What is claimed is:

1. In a loose leaf binder, a back plate having right angular ends that are provided on their inner faces with struck-out portions to form guide ways, and side clamping members of L-form having the ends of their sides turned at right angles to the bases thereof and seated on the latter, said clamping members having portions projecting beyond their ends and extending in said guide ways.

2. In a loose leaf binder, a back plate having right angular ends that are provided on their inner faces with struck-out portions to form guideways, and side clamping members having bases and right angular sides, the ends of the sides being turned at right angles thereto to have their inner edges directly seated on said bases, the bases being extended beyond said ends of the sides and t extending in said guideways.

3. In a loose leaf binder, y ing guideways on the inner faces of its ends, and side clamping members of L-shape having the ends of their sides turned inwardly and having the inner edges of said ends di- Copies of this patent may be obtained for ve cents each, by addressing the a back plat@ 1.1M" i reet-ly seating on the bases of said members, the ends of the bases being extended beyond said ends of the sides and received in the guideways.

4c. In a loose-leaf binder7 side Clamping members of L-form having the ends of their sides turned at right angles to the bases thereof and provided with feet which seat on the bases, and a back plate having ends prol vided with guideways for said members. l In testimony whereof I aliX my signature i, in presence of two witnesses.

EDWARD HARRY ELDER.

l l Witnesses:

l. JOHN W. DONOVAN, l; HoMER GENDRON.

Commissioner of Patents,

Washington, D. C. 

